Food wastes derived adsorbents for carbon dioxide and benzene gas sorption

Opatokun, Suraj Adebayo; Prabhu, A.; Shoaibi, Ahmed Al; Srinivasakannan, C.; Strezov, Vladimir

doi:10.1016/j.chemosphere.2016.10.083

Cited by 24 publications

(2 citation statements)

References 35 publications

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“…The latter is a so-called magnetic suspension balance (MSB), type Isosorp. 32 The equipment can be operated in a temperature range of 20–150 °C using a liquid circulator or 50–350 °C using an electrical heater at pressures up to 50 bars. To prevent any risk of unwanted condensation, maximum partial vapor pressures were limited to 70% of the dewpoint pressure.…”

Section: Methodsmentioning

confidence: 99%

“…The water vapor adsorption capacities of the samples were measured as a function of temperature and pressure using a gravimetric sorption analyzer (STATIC) from Rubotherm, Germany. The latter is a so-called magnetic suspension balance (MSB), type Isosorp . The equipment can be operated in a temperature range of 20–150 °C using a liquid circulator or 50–350 °C using an electrical heater at pressures up to 50 bars.…”

Section: Methodsmentioning

confidence: 99%

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Water Vapor Adsorption Capacity Loss of Molecular Sieves 4A, 5A, and 13X Resulting from Methanol and Heptane Exposure

et al. 2022

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Zeolite-based molecular sieves are applied in industrial dehydration units for their high water uptake capacities and extremely low equilibrium pressure of water vapor. During their operational life, they tend to lose their water vapor adsorption capacity slowly. To optimize the usage of molecular sieves in dryer units, it is vital to understand the mechanism(s) leading to deactivation. In this work, the capacity loss was studied by exposing LTA- and FAU-type zeolites to methanol and heptane vapors under relatively harsh conditions using repetitive adsorption/regeneration cycles. A simple microflow unit was designed and used for the deactivation experiments. The water vapor adsorption capacity of the resulting samples was measured using a gravimetric analyzer. In addition, they were characterized by classic XRD, 13 C NMR, and TGA techniques. The crystallinity of fresh and spent zeolite XRD patterns was not drastically affected even after exposure to the contaminants. It was found that methanol easily gave rise to a severe loss of water vapor adsorption capacity, much more so than heptane. Water vapor uptake in the methanol exposed samples is ∼50% lower than that for the fresh zeolites. This is attributed to nonvolatile, residual hydrocarbons.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Water Vapor Adsorption Capacity Loss of Molecular Sieves 4A, 5A, and 13X Resulting from Methanol and Heptane Exposure

et al. 2022

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Extracting adsorbate information from manometric uptake measurements of hydrogen at high pressure and ambient temperature

et al. 2021

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A critical review of biochar versus hydrochar and their application for H2S removal from biogas

Vuppaladadiyam,

Jena,

Hakeem

et al. 2024

Rev Environ Sci Biotechnol

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Biogas contains significant quantities of undesirable and toxic compounds, such as hydrogen sulfide (H2S), posing severe concerns when used in energy production-related applications. Therefore, biogas needs to be upgraded by removing H2S to increase their bioenergy application attractiveness and lower negative environmental impacts. Commercially available biogas upgradation processes can be expensive for small and medium-scale biogas production plants, such as wastewater treatment facilities via anaerobic digestion process. In addition, an all-inclusive review detailing a comparison of biochar and hydrochar for H2S removal is currently unavailable. Therefore, the current study aimed to critically and systematically review the application of biochar/hydrochar for H2S removal from biogas. To achieve this, the first part of the review critically discussed the production technologies and properties of biochar vs. hydrochar. In addition, exisiting technologies for H2S removal and adsorption mechanisms, namely physical adsorption, reactive adsorption, and chemisorption, responsible for H2S removal with char materials were discussed. Also, the factors, including feedstock type, activation strategies, reaction temperature, moisture content, and other process parameters that could influence the adsorption behaviour are critically summarised. Finally, synergy and trade-offs between char and biogas production sectors and the techno-economic feasibility of using char for the adsorption of H2S are presented. Biochar’s excellent structural properties coupled with alkaline pH and high metal content, facilitate physisorption and chemisorption as pathways for H2S removal. In the case of hydrochar, H2S removal occurs mainly via chemisorption, which can be attributed to well-preserved surface functional groups. Challenges of using biochar/hydrochar as commercial adsorbents for H2S removal from biogas stream were highlighted and perspectives for future research were provided. Graphical abstract

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Food wastes derived adsorbents for carbon dioxide and benzene gas sorption

Cited by 24 publications

References 35 publications

Water Vapor Adsorption Capacity Loss of Molecular Sieves 4A, 5A, and 13X Resulting from Methanol and Heptane Exposure

Water Vapor Adsorption Capacity Loss of Molecular Sieves 4A, 5A, and 13X Resulting from Methanol and Heptane Exposure

Extracting adsorbate information from manometric uptake measurements of hydrogen at high pressure and ambient temperature

A critical review of biochar versus hydrochar and their application for H2S removal from biogas

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